Apparatus for making sealing-rings for canning-jars.



PATENTED DEC. 22, 1903.v

I W. P. GOLDREN. APPARATUS FORYMAKING-SEALING'RINGS FOR GANNING' JARS.

APPLICATION FILED JULY 30. 1903.

H0 MODEL.

7 r Attorney AIS UNITED STATES Patented December 22, 1903 PATENT OFFICE.

WILLIAM P. GOLDREN, OF LEBANON, PENNSYLVANIA.

SPECIFICATION forming part of Letters Patent No. 747,377, dated December 2 03.

Application filed July 30, 1903. Serial No. 167,654. (No model.)

To all whom it may concern:

Be it known that LWILLIAM P. COLDREN, a citizen of the United States, residing at Lebanon, in the county of Lebanonand' State of Pennsylvania, have invented certain new and useful Improvements in Apparatus for Making Sealing-Rings for Canning-Jars; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. My invention'is an improved apparatus for making lipped sealing-rings used for sealing canning-jars and the like; and it consists in the construction and combination of devices hereinafter described.

My invention further relates to improvements in the construction of lipped sealingrings.

In the accompanying drawings, Figure 1 is a longitudinal sectional view of my improved apparatus for making lipped sealing-rings. Fig. 2 is a transverse sectional view of the same, taken on the plane indicated by the line a a of Fig.- 1. Fig. 3 is a similar view taken on the plane indicated by the line b b of Fig. 1. Fig. 4 is a similar View taken on the plane indicated by the line c of Fig. 1.

Fig. 5 is a detail elevation of the rubber tube from which the sealing-riugsare cut at an initial stage of the manufacture of said tube. Fig. 6 is a .similar view showing the form of the tube at a subsequent stage of the manufacture thereof. Fig. 7 is a similar view showing the form of said tube at a following stage of the construction thereof before the tube is discharged from the apparatus.

In the embodiment of my invention here shown I provide a vessel 1 of suitable size and shape and made of suitable material, which is adapted to hold a quantity of rubber or gum composition in a molten fluid condition and is provided on its upper side at one end with a hopper 2, through which the melted rubber is supplied thereto. At the opposite end of the vessel is a former spout or tube 3,.which is internally cylindrical and is provided, preferably on its upper side, with an interiorl'y-disposed longitudinal groove 4, the inner end of which terminates at some distance from the inner end of said former-tube, as at 5. This groove 4, which is a formerpassage, is here shown as of substantially semicylindrical shape to correspond with the shape of the lips formed on the outer sides of the sealing-rings. The shape of this groove 0r passage may be varied without departing from the spirit of my invention. The inner end of the former spout or tube 3 is here shown as screwed in an annular groove 6 in the outer" side of a collar 7, which collar is secured on the discharge end of the vessel 1 and is provided with a central opening 8, in which is centered and supported the inner end of the cylindrical former-mand rel 9,which is concentric with the bore of the formertube. The innerend of the said former-mandrel is preferably tapered, as'at l0, and the same is also formed with a rentrant beveled surface 11, forming an inclined plane which converges outwardly toward the inner side of the former-tube and opposite that portion of the former-tube between the inner end of the groove or passage 4 and the inner end of the former-tube. Y An opener 12, which is here shown as a blade tangential with relation to a circle concentric with the mandrel and formertube, is disposed between the mandrel and former-tube at their inner ends and is preferably opposite the rentrant surface 11 of them'andrel and former passage or groove 4 of the former-tube, but maybe otherwise disposed, if desired.

Within the scope of my invention any suitable means may be employed for forcing the melted rubber or gum composition from the vessel 1 through the former-spout, in which the mandrel is disposed and centered, and it will be understood that the rubber, as it hardens during its passage through the former spout or tube and around the mandrel, will form a cylindrical tube, and thatby cutting said tube cross-sectionally sealing-rings of suitable thickness may be formed. In the form of my invention here shown a screw 13, which acts as a plunger, is disposed in the vessel land provided with a crank 14, whereby it may be turned to force the molten rubber or gum composition from the vessel through the bore of the formertube and around the mandrel. Owing to the beveled rentrant surface 11 at the inner end of the mandrel opposite the space in the former-tube between the innerend thereof and the inner 'in Fig. 5.

end of the groove or passage 4, the tube of rubber or gum composition formed by the passage of the material through the formertube will be provided at the point at and contiguous to the plane indicated by the line d0. of Fig. 1 with a ren'rrant portion d, as shown The compression exerted by the rentrant surface 11 of the mandrel 9 on the inner side of the rubber or gum tube as it passes outwardly on the mandrel and within the former-tube will force the rentrant portion (1 of the rubber or gum composition tube outwardly and compress the said rubber or gum composition tube while it is still plastic into the former groove or passage 4:, so that the bead e will be formed exteriorly of the rubber or gum composition tube and the inner side thereof will be of true cylindrical form. The opener 12 initially opens one side of the rubber or gum composition tube, as at f. Said opener terminates at a point substantially opposite the inner end of the former groove or passage 4, so that during a later stage in the formation of the rubber or gum composition tube the sides of the opening f therein, which sides overlap, reunite, so that the tube becomes entire before it is discharged from the machine.

From the foregoing description, taken in connection with the accompanying drawings, the construction and operation of the in vention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In apparatus for making lipped sealingrings, the combination of a former-tube having an internal longitudinal groove terminating short of the inner end thereof, and a mandrel in said tube having a rentrant surface converging outwardly toward the inner side of said former-tube and opposite that portion thereof between its inner end and the inner end of the said groove.

2. In apparatus for making lipped sealingrings, the combination of a former tube, a mandrel therein, and means to force molten rubber or gum composition between them and thereby form a tube of such material, means to open one side of said tube longitudinally, said means being spaced from the discharge end of the former'tube, so that the sides of the opening formed in the rubber or gum composition tube reunite during the passage thereof through the former-tube.

3. An apparatus for forming a tube of rubber, gum composition or the like for use in the manufacture of lipped sealing-rings, having means to initially form a rentrant portion in the bore of said tube, and means to subsequently press said rentrant portion outwardly and form a longitudinal bead on the outer side of said tube.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

W. P. COLDREN. Witnesses:

BENJ. G. COVEL, J. O. WILLSON. 

